Messages in this thread | | | Date | Wed, 11 Jun 2014 18:33:41 +0200 (CEST) | From | "Mkrtchyan, Tigran" <> | Subject | pNFS client behavior confirmation |
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Dear pnfs developers,
I would like to confirm client behavior which was hurting us for years.
If for some reason the client is unable to connect to a DS, then this DS got blacklisted and the only way to whitelist it again was client reboot. With RHEL7 (and I believe with upstream kernel), after 2 mins client 'forgets' about bad DS and uses it again. This behavior is tested and confirmed during June bakeathon.
Missing bits:
i) it takes client 6 min to fall back to MDS, e.g time between LAYOUTGET and first WRITE to MDS ii) there are no log entries why client have decided to use MDS
Thanks, Tigran.
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